框架预应力锚杆边坡支护结构稳定性计算方法及其应用

基于土体边坡滑动面的破坏模式及极限平衡理论,采用圆弧滑动条分法,在考虑支护结构、锚杆对土体边坡稳定性影响的情况下,建立了边坡最危险滑移面的搜索模型,推导了边坡滑移面圆心位置与稳定系数之间的函数关系。通过计算机动态设定滑移面圆心所在区域,并在圆心区域内采用网格法搜索最危险滑移面的圆心,实现了基于计算机搜索的框架预应力锚杆边坡支护结构稳定性计算方法。最后,开发了框架预应力锚杆稳定性计算软件,并结合具体工程实例进行了验算。

STABILITY CALCULATION METHODS FOR GRILLAGE SUPPORTING STRUCTURE WITH PRESTRESSED ANCHOR AND ITS APPLICATION

Based on the failure mode of the slip surface and the theory of limit equilibrium,using the circular slice method,and considering the supporting structure and anchor effects on stability of soil slope,the search model for the most dangerous slip surface is set up;and the function relationship between stability factors and the center of circular slip surface is derived.By setting the center zone of slip surface dynamically with computer,and searching the center of slip surface by the method of lattice in the center region,a method of the stability calculation for the grillage supporting structure with prestressed anchor is given.Finally,the calculation software is developed and applied to a practical case.